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Plane-wave analysis of SOI data

  • R. S. Bogart (a1), L. A. Discher De Sá (a1), I. González Hernández (a2), J. Patrón Recio (a2), D. A. Haber (a3), J. Toomre (a3), F. Hill (a4), E. J. Rhodes (a5), Y. Xue (a5) and The SOI Ring Diagrams Team...

Abstract

The unprecedented combination of spatial resolution and stability achieved by the Solar Oscillations Investigation/Michelson Doppler Imager on SOHO has opened up new opportunities for the analysis of solar surface oscillations of high spatial frequencies. In this regime the oscillations are essentially plane waves, amenable to the techniques of ring-diagram analysis of their three-dimensional power spectra. This approach holds the promise of measuring fluid motions and possibly magnetic fields in spatially-resolved structures within the uppermost levels of the convective envelope, a region unresolved by the global modes. Atmospheric g-modes trapped above the photosphere may also be detectable. We review the first results of plane-wave analysis of various types of SOI data and comparisons with the analyses of comparable ground-based datasets.

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References

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Bogart, R. S., , L. A. D., Duvall, T. L., Haber, D. A., Toomre, J. and Hill, F. (1995) Plane-Wave Analysis of Solar Acoustic-Gravity Waves: A Slightly New Approach. Proceedings of the Fourth Soho Workshop, on Helioseismology, Pacific Grove, California, USA, 2-6 April 1995 (ESA SP-376) , Vol. 2, pp. 147150.
Bogart, R. S., , L. A. D., Haber, D. A., and Hill, F. (1995) Preliminary Results From Plane-Wave Analysis of Helioseismic Data. Proceedings of the Fourth Soho Workshop, on Helioseismology, Pacific Grove, California, USA, 2-6 April 1995 (ESA SP-376) , Vol. 2, pp. 151152.
González, I, Patrón, J, and the TON TEAM (1995) Ring Diagram Analysis With TON: Preliminary Results. Proceedings of the Fourth Soho Workshop, on Helioseismology, Pacific Grove, California, USA, 2-6 April 1995 (ESA SP-376) , Vol. 2, pp. 137139.
González Hernández, I, Patrón, J, Bogart, R., Sá, L., and the TON and SOI Teams (1996) Comparison of SOI and TON Data With Ring Diagram Techniques Sounding Solar and Stellar Interiors: IAU Symposium 181 Nice, France, 30 Sep.–3 Oct 1995. (in press).
Haber, D. A., Toomre, J., Hill, F., and Gough, D. O. (1995) Local-Area Analysis of High-Degree Solar Oscillations: New Ring Fitting Procedures. Proceedings of the Fourth Soho Workshop, on Helioseismology, Pacific Grove, California, USA, 2-6 April 1995 (ESA SP-376) , Vol. 2, pp. 141146.
Haber, D., Zweibel, E., Toomre, J., Bogart, R. S., , L., Burnette, A., Xue, Y., Rhodes, E., and Hill, F. (1996) Possible magnetic field effects seen with local-area analysis of MDI and Mount Wilson data. Sounding Solar and Stellar Interiors: IAU Symposium 181 Nice, France, 30 Sep.–3 Oct 1995. (in press).
Hill, F. (1988) Rings and Trumpets— Three Dimensional Power Spectra of Solar Oscillations. Ap.J., 333, pp. 9961013.
Patrón Recio, J. (1994) Tridimensional Distribution of Horizontal Velocity Flows Under the Solar Surface. Doctoral Dissertation, Departamento de Astrofisica, Universidad de La Laguna.
Patrón, J, González Hernandez, I, and the TON TEAM (1995) Comparisons on fitting ring diagrams. Sounding Solar and Stellar Interiors: IAU Symposium 181 Nice, France, 30 Sep.–3 Oct 1995. (in press).
Snodgrass, H.B. (1984) Separation of Large-Scale Photospheric Doppler Patterns. Solar Phys., 94, pp. 1331.

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